/*
 * Debts Manager. Simple android application for managing debts.
 * Copyright (C) 2010 Maxim Manuylov
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/gpl-2.0.html>.
 */

package manuylov.maxim.dm.data.util;

import android.app.Activity;
import manuylov.maxim.common.util.CommonUtil;
import manuylov.maxim.dm.data.DataManager;

public class DataUtil {
    public static <T> void perfromDataAction(final Activity activity,
                                             final int messageResId,
                                             final DataProcessor<T> dataProcessor,
                                             final DataActionResultProcessor<T> resultProcessor) {
        final DataActionRunner<T> dataActionRunner = new DataActionRunner<T>(activity, dataProcessor);
        CommonUtil.performLongAction(activity, messageResId, dataActionRunner, new Runnable() {
            public void run() {
                resultProcessor.process(dataActionRunner.getResult());
            }
        });
    }

    private static class DataActionRunner<T> implements Runnable {
        private final DataProcessor<T> myDataProcessor;
        private final Activity myActivity;
        private T myResult = null;

        public DataActionRunner(final Activity activity, final DataProcessor<T> dataProcessor) {
            myDataProcessor = dataProcessor;
            myActivity = activity;
        }

        public T getResult() {
            return myResult;
        }

        public void run() {
            final DataManager dataManager = new DataManager(myActivity);
            try {
                myResult = myDataProcessor.process(dataManager);
            }
            finally {
                dataManager.close();
            }
        }
    }
}
